Manufacture or treatment of textile or other material



" other products produced used at a higher pressure,

Patented Dec. 13, 1932 UNITED STATES PATENT OFFICE GEORGE HOLLAND ELLIS AND HENRY CHARLES OLIPIN, OF SPONDON, NEAR DEBI BY, ENGLAND, ASSIGNOBS TO CELANESE CORPORATION OF AMERICA, A CORPORATION OF DELAWARE MANUFACTURE OB TREATMENT OF TEXTILE OR OTHER MATERIAL R0 Drawing. Application filed January 6,

This invention is a continuation in part of United States application S. No. 415833 of 21st December, 1929 and relates to the treatment and also to the manufacture of artificial silk and other filaments or products and to the treatment of yarns, fabrics or other materials made of or containing filaments or other products produced from solutions of cellulose esters or ethers.

The said prior United States application describes processes for the treatment of materials made of or containing filaments or from solutionsof cellulose esters or ethers with steam, whereby already delustered materials or materials of low lustre are rendered lustrous, and by continuing the treatment sufiiciently the materials may be rendered non-delusterable on treatment with hot aqueous liquids or moist steam. The said prior United States application indicates that it is preferable to employ tem eratures of steam approximating to or slig tly above the boiling point of water at the pressure used, though it is stated that higher temperatures may be employed.

The present invention relates more particularly to rendering delustered materials or materials of relatively low lustre, such as are treated according to the processes of the said prior United States application, with steam.

so as to increase their lustre. We have now found that in this particular application of the rocesses of the said prior United States application considerable advantages accrue from efiectingi lthe treatment with superheated steam. T e steam may be employed at atmospheric pressure but preferably it is and in any case is superheated. The temperature of the heat- 40 ed steam may vary for example from 5100 at the pressure obtaining, temperature in question does not reach the decomposition temperature of the cellulose C. above the boiling point of water ester or ether contained in the material or provided that the 1931, Serial No. 507,046, and in Great Britain March 5, 1930.

the scorching temperature of any other fibre which may be used 1n assoclation.

As in the said prior United States application a stretch may be imparted to the filaments, yarns, fabrics or other products treated,*e1ther before or during the steaming treatment. Again as in the said prior United States application filaments or 1 threads of any type, for example flat or ribbon-like filaments, semi-round and round filaments and the so-called hollow, tubular or voluminous filaments orthreads may be treated, and in addition any products made therefrom with or without other fibres, for example cotton, the cellulosic type of artificial silk or natural silk. The materials treated according to the present invention may be either completely delustered with regard to their cellulose ester or ether content or may be partially or locally delustered. In the last case the process of the invention renders the lustre of the materials substantially uniform.

The following examples show the best methods known to us for carrying the-invention into effect but they are not to be considered as limiting it in any way E wample 1 E mample 2 A fabric composed of a real silk crepe weft and a cellulose acetate warp, which has been much reduced in lustre by boiling in an aquef 60 the materials to the action of ous soap solution, is formed into a series of loops and introduced into a steaming chamber fitted with a heated oil jacket and a steam supply with super heater. It is treated for 1 hour, the steam pressure being adjusted to lbs. per square inch and the temperature to 180 C. Thezlustre of the fabric is restored.

' Example 3 iii garment made from fabric composed of cellulose acetate yarns, and which has been delustered in places owing to laundering in soap solution at too high a tem rature, is placed in the dry state on a suita 1e form to preserve the shape and thus introduced into a steaming a paratus, as described in the above example. t is treated for minutes with steam at lbs. per square inch, the temperature being adjusted to 150 C. The lustre of the arment is restored.

' at we claim and desire to secure by Letters Patent is 1. Process for increasing at least locally the lustre of the materials containing cellulose derivatives which have been delustered by the action of hot aqueous media, comprising subi'lectinf the materials to the action of supereate steam.

2. Process for increasing at least locally the atives of cellulose which have beendelustred by the action of hot aqueous media, comprising subjecting the materials to the action of super-heated steam.

3. Process for increasing at least locally the lustre of materials contamin cellulose acetate which have been delustre by the action of hot aqueous media, comprising subjectin the materials to the action of super-heated 40 steam.

the materials to the actionof super-heated steam at pressures greater than atmospheric which is at a temperature of 5 to 100 0. above the boiling point of water at the prevailing pressure of the steam.

In testimony whereof we have hereunto subscribed our names.

GEORGE HOLLAND ELLIS. HENRY CHARLES OLPIN.

3o lustre of materials contammg organic deriv- 4. Process for increasing at least locally the lustre of materials containing cellulose acetate which have been delustred by the action of hot aqueous media, comprising subjectin the materials to the action of super-heat steam which is at a temperature of 5 to 100 C.

above the boiling int'of water at the prevalmlg pressure 0 the steam. r

lustre of ocess for increasing at least locally the 7 materials containing organic de-- rivatives of cellulose which have been delustred by the action of hotaqueous media, comprising subjecting .the materials to the action of super-heated steam at pressures greater than atmospheric. I i

6. Proceu for increasing at least locally the lustre of materials contamin cellulose acetate which have been delustre d bythe action of hot aqueous media, comprising subjectin super-heat steam at pressures greater than atmospheric.

7. Process for increasing at least locally the lustre of materials containing cellulose acetate which have been delustred by the action of hot aqueous media, comprising subjecting 

